Question

tìm x : x^3-4x^2+4x=o

 

Answer 1

\(x^3-4x^2+4x=0\)

=>\(x\left(x^2-4x+4\right)=0\)

=>\(x\left(x-2\right)^2=0\)

=>\(\left[{}\begin{matrix}x=0\\\left(x-2\right)^2=0\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=0\\x-2=0\end{matrix}\right.\)

=>\(\left[{}\begin{matrix}x=0\\x=2\end{matrix}\right.\)